DOWNLOAD Sharp LL-T15S1 (serv.man7) Service Manual ↓ Size: 17.34 KB | Pages: 3 in PDF or view online for FREE

Model
LL-T15S1 (serv.man7)
Pages
3 Few pages! See other manuals at the bottom of the first or last page.
Size
17.34 KB
Type
PDF
Document
Service Manual
Brand
Device
Monitor / Chapter 5 - Troubleshooting
File
ll-t15s1-sm7.pdf
Date

Sharp LL-T15S1 (serv.man7) Service Manual ▷ View online

A
Screen does not operate normally.
Check RGB cable.
Defective
Replace RGB cable with 
a new one.
Check screen condition by changing display modes.
Reset the microprocessor to check if screen condition changes.
(Press and hold MENU and SELECT buttons while turning on power switch.)
Screen stays in black.
Screen stays in white.
Screen jitters or on-screen 
characters flicker.
Abnormal color
Check the following signals
1) Check if module control signal is output.
2) Check if gate voltage is output normally.
3) Check if Source voltage is output normally.
Yes
No
Yes
No
Yes
No
CLOCK and PHASE 
can be adjusted?
Does abnormal area move on 
screen when BLACK LEVEL or 
CONT is changed after H-POS 
or V-POS is set?
Switch PWB defective
Main PWB defective.
LCD panel defective.
<Voice output error>
+12 V DC at 1st and 2nd pins of JP1?
Signal input of 4th pin of U12 is at H level
(+5 V DC)?
Check mute input circuit of I/F board.
Input signal of 3rd and 5th pins of U12 is normal?
Check power supply, vo ice input and voice
input circuit of I/F board.
Signal input at 1st and 7th pins of U12 changes
when voice volume is changed.
Check control PWB and the volume circuit
around U11.
Signal output at 8th, 10th, 11th and 13th pins of
U12 is normal?
Check amplifier circuit around U12.
Check speakers and speaker cables.
• Check connection of JP1 connector.
• Check fuse F1 of Power Jack PWB.
<Voice output error>
+12 V DC at 1st and 2nd pins of JP1?
Signal input of 4th pin of U12 is at H level
(+5 V DC)?
Check mute input circuit of I/F board.
Input signal of 3rd and 5th pins of U12 is normal?
Check power supply, vo ice input and voice
input circuit of I/F board.
Signal input at 1st and 7th pins of U12 changes
when voice volume is changed.
Check control PWB and the volume circuit
around U11.
Signal output at 8th, 10th, 11th and 13th pins of
U12 is normal?
Check amplifier circuit around U12.
Check speakers and speaker cables.
• Check connection of JP1 connector.
• Check fuse F1 of Power Jack PWB.
<Voice output error>
+12 V DC at 1st and 2nd pins of JP1?
Signal input of 4th pin of U12 is at H level
(+5 V DC)?
Check mute input circuit of I/F board.
Input signal of 3rd and 5th pins of U12 is normal?
Check power supply, vo ice input and voice
input circuit of I/F board.
Signal input at 1st and 7th pins of U12 changes
when voice volume is changed.
Check control PWB and the volume circuit
around U11.
Signal output at 8th, 10th, 11th and 13th pins of
U12 is normal?
Check amplifier circuit around U12.
Check speakers and speaker cables.
• Check connection of JP1 connector.
• Check fuse F1 of Power Jack PWB.
Display

Sharp LL-T15S1 (serv.man7) Service Manual ▷ Download

  • DOWNLOAD Sharp LL-T15S1 (serv.man7) Service Manual ↓ Size: 17.34 KB | Pages: 3 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp LL-T15S1 (serv.man7) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp LL-T15S1 (serv.man7) Monitor. Information contained in Sharp LL-T15S1 (serv.man7) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.